Tire-core



W. A. BLACK.

' TIRE C-ORE.

My I APPLICATION FIL ED SEPT. 13, I919. 1,378,315. Patented May 17,1921.

UNITED STATES Tran-cone.

WALTER A. BLACK, OF ROCKY FORD, COLORADO.

Specification of Letters Patent; Patented lvlay 1'7, 1921.

Application filed. September 13, 1919. Serial'lTo. 324,171.

To all whom it may concern:

Be it known that I, WVALTER A. Enron,

citizen of 'the United States, residing at" Rocky Ford, in the county of Oterov and State of Colorado, have invented certain new and useful Improvements in Tire-Cores, of which the following is a specification.

This inventlon relates to cores or fillers to be used in tire-casings to keep them distended and to sustain the load imposed" thereon, and which are employed.foripurposes similar to pneumatic inner-tubes.

It is'an object of the invention to provide a core of that character so formed that it will be sufiiciently compressible in response to shocks and stresses resulting from un evenness of a roadway, or from other causes,

that it will absorb them to a great extent and contribute to the comfortable progress" of the vehicle with which it is associated,

andat the same'time be so resistant to compression as to afford a load-sustaining means; that w1ll prevent such flattening of the casing as will result in injury thereto and elimination of the resilient qualities of the tire.

Then read in connection with the'description herein, the characteristics of the invention will'be apparent from the accompanying drawing, forming part hereof, wherein an embodiment of the invention is disclosed, for purposes of illustration.

While the disclosures herein exemplify what now is considered to be a preferable embodiment of the invention, it is to be understood that it is not the intention to be limited necessarily thereto in interpretation of they claims, as modifications and adaptations within the limits of the claims can be made without departing from the nature of the invention.

Like reference-characters refer to corresponding parts in the views of the drawing, of which- Figure l is a transverse sectional view of a wheel-rim, casing, and core, the section of the core being on the line 11, Fig. 2;

Fig. 2 is a circumferential perpendicular sectional view of the core on the line 2-2, Fig. 1;

Fig. 3 is a sectional view on the line 3-3, Fig. 2; and

Fig. 4 is a transverse sectional view on the line 44, Fig. 2.

Having more particular reference to the drawing, A designates a wheel-rim and B a tire-casin b. ordmarycommerc al, form.

For the purpose of filling such a casing and rendering it properly resistant to loads, stressesy'and shocks imposed thereon, the invention provides a. core 5, which is formed of any suitable resilient material, such as rubber. V

in order that the core may give to thetire such resiliency as is required forabsorption thereon, theseparts being of of stresses and shocks and such, resistance thereto as will prevent injurious flattening of the casing, it is formed with a plurality of recesses or cavities 6, which open tothe sides thereof and with the wall of the casing afford air-chambers. A,

These recesses are of equal size and areof .the'same shape,and they are arranged in two series, one on each side of the core and extending 1n uniform separated relation'ent1rely around its clrcuinferenceyand those of one series are staggered with relation to those of the other, so that those on one side are Opposite to the core material between those of the other side. 7 While the recesses extend for an appre ciable depth into the core, they do'not reach the radial axis thereof,fand an uninterrupted center mass or wall of material, as indicated by 7, extends circumferentially' throughout the core. The mass or walls between the separated recesses of each series are integral with the center wall, and with that wall they"constitute'a supporting ele- -ment of the core.v

The recesses are longer than they are wide (when viewed from the side of the core), and each of them is rounded or-arch-shaped circumferentially of the core at the opposite ends lying, respectively, adjacent to the outer and inner peripheries of the core, the sides are substantially straight and convergent from the outer toward the inner end, and, therefore, the recesses are wider at the outer than at the inner ends. I

Each recess also is rounded or arch-shaped at its outer and inner ends in a transverse direction, and the curves of those ends in that direction merge into curved surfaces of the back or inner end of the recess, which become reverse curves and meet in anmdentation 8 extending into the center core mass between the two scenes of recesses and having its bottom slightly rounded.

quantity and density of the mass resisting compression, and there is restoration toward orlglnal contour as such force decreases; and :they make the mass less sus-.

ceptible to destruction of its integrity under excessive loads, shocks, and stresses. Moreover, when there is air-tight fit of the casing over the core, as there may be with proper association of the parts, air in the recesses has cushioning action in View of its resistance to compression as the size of those recesses is reduced by compression of the core mass.

Havingthus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A resilient core having spaced recesses opening to a side thereof, each of said recesses having arch-shaped ends and substantially straight sides and a reverselycurved back surface extending to an in dentation.

2. A core of resilient material containing a series of spaced recesses open to each side thereof extending inwardly to a central mass of material extending continuously and uninterruptedly around the core and from its inner to its outer sides, the rear walls of said recesses being reversely curved and extending to indentations in said central mass.

3. A reslllent core containing a series of spaced recesses open to a side thereof, each of said recesses having an indentation in its inner wall and the surface of said wall being disposed in reverse curves extending to the indentation whereby the wall surface on each side of the indentation is pressed together under compression action on the core and resistance to compression increased.

A resilient core containing a series of spaced recesses in each side portion thereof open to the side, each recess of each series having anindentation in its inner wall extending into material between the two series and the surface of said wall being disposed in reverse curves extending to the indentation whereby the wall surface on each side of the indentation is pressed together under compression action 011 the core and resistance to compression increased.

5. A core of resilient material containing a series of spaced recesses in each side portion thereof open to the side and extending inwardly to a central mass of material extending continuously and uninterruptedly around the core and from its inner to, its outer sides, each recess of each series having an indentation in its inner wall extending into sald central mass and the surface of said wall being disposed in reversecurves extending to the indentation whereby the wall surface on each side of the indentation is pressed together under compression action on. the core and resistance to compression increased.

Dated at Rocky Ford, State of Colorado,

July 25th, 1919.

In testimony whereof, I sign the foregoing articles in the presence of two witnesses.

WALTER A. BLACK.

Witnesses:

WILLIAM B. GoBIN, MARJORIE BATCHELDER. 

